To accurately identify the conclusion that can be drawn from the passage, I would need to read the passage itself. However, based on the provided statements, I can offer guidance.
If the passage discusses the health impacts of sugar, emphasizing its negative effects, the statement "Sugar is not good for people" might be a fitting conclusion.
If it talks about the immune system and highlights potential risks involved with immune responses, then "Immune system cells can be dangerous" could be appropriate.
If the focus is on the importance of carbohydrates in providing energy or nutrients, then "Carbohydrates play an important role in the body" would be the correct conclusion.
Finally, the statement about chemistry being the most valued subject in science seems more subjective and is less likely to be drawn as a conclusion unless the passage specifically discusses the value of chemistry in comparison to other sciences.
Without the exact passage context, it's challenging to pinpoint the most accurate conclusion. If you can provide more details or the actual passage, I'd be happy to help further!